Louvered ventilation grille



FIG. 1 is a front view of the louvered air ventilation grille;

FIG. 2 is a perspective view from above and from the left of the louvered air ventilation grille of FIG. 1;

FIG. 3 is a perspective view from above and from the right of the louvered air ventilation grille of FIG. 1;

FIG. 4 is a perspective view from below and from the left front of the louvered air ventilation grille of FIG. 1;

FIG. 5 is a perspective view from below and from the right front of the louvered air ventilation grille of FIG. 1;

FIG. 6 is a front view of a variant of the louvered air ventilation grille;

FIG. 7 is a perspective view from above and from the left of the louvered air ventilation grille of FIG. 6;

FIG. 8 is a perspective view from above and from the right of the louvered air ventilation grille of FIG. 6;

FIG. 9 is a perspective view from below and from the left front of the louvered air ventilation grille of FIG. 6;

FIG. 10 is a perspective view from below and from the right front of the louvered air ventilation grille of FIG. 6;

FIG. 11 is a front view of a further variant of the louvered air ventilation grille;

FIG. 12 is a perspective view from above and from the left of the louvered air ventilation grille of FIG. 11;

FIG. 13 is a perspective view from above and from the right of the louvered air ventilation grille of FIG. 11;

FIG. 14 is a perspective view from below and from the left front of the louvered air ventilation grille of FIG. 11;

FIG. 15 is a perspective view from below and from the right front of the louvered air ventilation grille of FIG. 11;

FIG. 16 is a front view of an additional variant of the louvered air ventilation grille;

FIG. 17 is a perspective view from above and from the left of the louvered air ventilation grille of FIG. 16;

FIG. 18 is a perspective view from above and from the right of the louvered air ventilation grille of FIG. 16;

FIG. 19 is a perspective view from below and from the left front of the louvered air ventilation grille of FIG. 16; and,

FIG. 20 is a perspective view from below and from the right front of the louvered air ventilation grille of FIG. 16.

The features shown in broken lines depict environmental subject matter only and forms no part of the claimed design. 

The ornamental design for a louvered air ventilation grille, as shown and described. 